高原季风强弱对高原涡的影响

Effect of Plateau Monsoon Strength on Plateau Vortex

该文基于高原季风指数和高原涡数据集,对比分析夏季高原季风强弱年高原涡源地、路径、频数、强度、冷暖性质、面积、持续时间等特征,并对其影响机制进行讨论,结果表明:①高原夏季风低层由四周吹向主体,高层由高原主体吹向四周。②高原季风强度与高原涡生成频数、东移个数、高原东部高原涡的生成频数呈正比,与高原涡长生命史呈反比。③初始阶段,高原涡强度对季风强弱感知比较敏感,高原东侧的强潜热区利于高原涡东移。且由于在季风强年高原中西部的感热强,强度较大的高原涡大都初生在高原中西部,高原涡的强度在初生时较强。

Based on the plateau monsoon index and plateau vortex data sets,contrast analysis in the plateau summer monsoon intensity,plateau vortex source,path,the frequency,intensity,the nature of the changes in temperature,area,duration and other characteristics,and the mechanism of the effects are discussed,the main results are:①the plateau summer wind blowing lower by the main body,high plateau main blowing around.②Plateau monsoon intensity is directly proportional to the generation frequency of the Plateau vortex,the number of eastward migration,and the generation frequency of the Plateau vortex in the east of the Plateau,and inversely proportional to the long life history of the Plateau vortex.③In the initial stage,the intensity of the Plateau vortex is sensitive to the monsoon strength,and the strong latent heat area on the east side of the Plateau is conducive to the eastward movement of the Plateau vortex.Moreover,because of the strong sensible heat in the central and western parts of the Plateau in strong monsoon years,most of the high-intensity Plateau vortexes were born in the central and western parts of the Plateau,and the intensity of the Plateau vortexes was stronger at the beginning.